# Sign PDF vs 龙嘉SCM供应商

The clearest difference is in-app purchases: 龙嘉SCM供应商 at none against Sign PDF's 3. 龙嘉SCM供应商 also leads on update cadence (every 4 months vs every 69 months) and iOS requirement (12.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Sign PDF sells 3 in-app purchases, starting at $3.99 per 7 days. 龙嘉SCM供应商 asks for nothing beyond the download.

Sign PDF ships an update every 69 months, 龙嘉SCM供应商 every 4 months. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Sign PDF | 龙嘉SCM供应商 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 7.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 69 months | **Every 4 months** |
| Monetization | Free | — |
| Size | 3 MB | 35 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Matteo Morelli](https://appshunter.io/developer/520803077) | [文朗 梁](https://appshunter.io/developer/1293631579) |

## What reviewers say

### Sign PDF

[App page](https://appshunter.io/ios/app/sign-pdf-scan-and-fill-docs/id979534235)

Easily add your signature to PDF documents using your device. Create signatures by taking a photo, using special fonts, drawing on screen, or importing an image. Export signed documents as PDFs or JPEGs, and print or share them directly.

**Highlights:** Apply signature to PDF, Export as PDF, PDF to JPEG conversion, Print from device, Share via email, Multiple signature creation modes

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Firma Pro Weekly | $3.99 | per 7 days |
| Firma Pro Yearly | $22.99 | per year |
| Firma Pro Lifetime | $49.99 | one-time |


### 龙嘉SCM供应商

[App page](https://appshunter.io/ios/app/scm/id1459545200)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sign PDF free?

Sign PDF is free to download, with in-app purchases available.

### Is 龙嘉SCM供应商 free?

龙嘉SCM供应商 is free to download, with no in-app purchases.

### Do Sign PDF or 龙嘉SCM供应商 have ads?

Neither Sign PDF nor 龙嘉SCM供应商 shows ads.

### Which is updated more often, Sign PDF or 龙嘉SCM供应商?

Sign PDF ships an update every 69 months, and 龙嘉SCM供应商 every 4 months. Most recently, Sign PDF was updated on November 1, 2026 and 龙嘉SCM供应商 on October 26, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*